@@ -15,14 +15,18 @@
  */
 
 #import "OFINICategory.h"
 #import "OFString.h"
 
+OF_ASSUME_NONNULL_BEGIN
+
 @class OFStream;
 
 @interface OFINICategory (OF_PRIVATE_CATEGORY)
 - (instancetype)OF_init;
 - (void)OF_parseLine: (OFString*)line;
 - (bool)OF_writeToStream: (OFStream*)stream
 		encoding: (of_string_encoding_t)encoding
 		   first: (bool)first;
 @end
+
+OF_ASSUME_NONNULL_END